Coking tower waste heat treatment three-sludge device

Abstract

The utility model discloses a coke tower waste heat treatment three-sludge device which comprises a three-sludge tank, a coke tower, a lower intelligent spraying system and an upper intelligent spraying system, a lower three-sludge input pipe is arranged between the three-sludge tank and the lower intelligent spraying system, and a three-sludge pump is arranged on the lower three-sludge input pipe. A lower spraying input header is arranged between the lower intelligent spraying system and the coke tower in a communicating mode, an upper three-sludge input header is arranged on the lower three-sludge input pipe in a communicating mode, one end of the upper three-sludge input header is connected with the upper intelligent spraying system in a communicating mode, and an upper spraying input pipe is arranged between the upper intelligent spraying system and the coke tower in a communicating mode. And the top of the coke tower is communicated with an oil-gas output pipe. The device has the effects that the oil gas and coke waste heat of the coke tower are fully utilized in each treatment period, and the treatment capacity of the three sludge and the safety of the treatment process are improved.

Description

Technical Field

[0001] The present application relates to the technical field of three-mud treatment, and in particular to a coke tower waste heat treatment three-mud device. Background Art

[0002] The scum produced by the flotation tank in the sludge workshop of the refinery, the oil sludge discharged from the bottom of the sewage pipe and the oil separator, and the activated sludge produced by biochemical treatment are collectively referred to as the three muds. The three muds are hazardous chemical wastes that will have a serious impact on the environment and need to be treated to meet the standards before being discharged. Usually, the three muds need to be first precipitated and dehydrated using a concentration tube, and then the sedimented and dehydrated three muds are dehydrated using a centrifuge or a screw stacker. The three muds that have been centrifugally dehydrated are dried and incinerated or entrusted to a unit with corresponding qualifications for treatment, but the operating costs or treatment costs are high and will cause secondary pollution to the environment.

[0003] The delayed coking unit of the refinery is used to process heavy oil. After the heavy oil is heated by the heating furnace, it enters the coke tower to undergo a physicochemical reaction. The gaseous medium is discharged from the top of the tower, and the solid coke remains in the coke tower. After the heavy oil has been coked in the coke tower for a certain period of time, it needs to be switched to a new tower. Since the old coke tower contains more light oil, a certain amount of steam is needed to blow the coke tower. This process is the process of large steam blowing of the coke tower. In order to utilize the heat of the coke during the large steam blowing, the coking method is used to refine the three muds back and forth. The three muds are introduced into the coke tower during the large steam blowing stage. The three muds undergo a physicochemical reaction. The light oil and water in the three muds are vaporized and enter the downstream venting tower. The heavy oil and impurities react in the coke tower to form coke.

[0004] At present, a Chinese patent with the announcement number CN203382711U discloses a combined recovery device for three-mud treatment and large steam blowing in a refinery. This patented technology only injects three-mud from the bottom of the coke tower during large steam blowing, and uses the heat of coke in the coke tower to treat the three-mud. Each tower processes about 40 tons of three-mud each time. However, this patented technology only uses the heat of coke during large steam blowing, and the recycling amount of three-mud in the coking unit is greatly limited. Utility Model Content

[0005] In order to fully utilize the oil and gas in the coke tower and the waste heat of coke during each treatment period, and to increase the treatment volume of the three muds and the safety of the treatment process, the present application provides a coke tower waste heat treatment three muds device.

[0006] The present application provides a coke tower waste heat treatment three-mud device adopts the following technical solution:

[0007] A three-mud device for waste heat treatment of a coke tower comprises a three-mud tank, a coke tower, a lower intelligent spray system and an upper intelligent spray system, wherein a lower three-mud input pipe is arranged between the three-mud tank and the lower intelligent spray system, a three-mud pump is arranged on the lower three-mud input pipe, a lower spray input header is arranged in communication between the lower intelligent spray system and the coke tower, an upper three-mud input header is arranged in communication on the lower three-mud input pipe, the upper three-mud input header is arranged on the pipe section of the lower three-mud input pipe between the three-mud pump and the lower intelligent spray system, one end of the upper three-mud input header away from the lower three-mud input header is connected to the upper intelligent spray system, an upper spray input pipe is arranged in communication between the upper intelligent spray system and the coke tower, and an oil and gas output pipe is arranged in communication at the top of the coke tower.

[0008] By adopting the above technical solution, the three muds are divided into two paths under the action of the three mud pump and enter the lower intelligent spray system and the upper intelligent spray system respectively. The three muds are atomized into spray in the lower intelligent spray system and the upper intelligent spray system, and enter through the top and bottom of the coke tower. The three muds entering the top of the coke tower use the heat of oil and gas to react, and the three muds entering the bottom of the coke tower use the heat of coke to react. Through the mutual cooperation of the three mud tank, the coke tower, the lower intelligent spray system and the upper intelligent spray system, the heat of oil and gas at the top of the coke tower and the heat of coke at the bottom are utilized at the same time, which has the effect of fully utilizing the oil and gas of the coke tower and the waste heat of coke during each treatment period, improving the processing capacity of the three muds and the safety of the treatment process.

[0009] Optionally, the lower intelligent spray system is connected to a lower low-pressure steam input pipe, the lower low-pressure steam input pipe is connected to an upper low-pressure steam input header, and the upper low-pressure steam input header is connected to the upper intelligent spray system.

[0010] By adopting the above technical solution, low-pressure steam is mixed with the three muds, and the mixture is simultaneously introduced into the upper intelligent spray system and the lower intelligent spray system, which helps the three muds to form a uniform and small-particle spray and helps the three muds to react in the coke tower.

[0011] Optionally, two coke towers and two upper intelligent spray systems are provided, and two lower spray input branch pipes are connected to the end of the lower intelligent spray system, and a coke oil connecting pipe is connected to the bottom of the two coke towers. The ends of the two coke oil connecting pipes away from the coke towers are commonly connected to a coke oil input pipe, and the two lower spray input branch pipes are connected to the two coke oil connecting pipes in a one-to-one correspondence. The end of the upper three-mud input manifold away from the three-mud tank is connected to two upper three-mud input branch pipes, and the two upper three-mud input branch pipes are connected to the two upper intelligent spray systems in a one-to-one correspondence. The end of the upper low-pressure steam input manifold close to the upper intelligent spray system is connected to two upper low-pressure steam input branch pipes, and the two upper low-pressure steam input branch pipes are connected to the two upper intelligent spray systems in a one-to-one correspondence.

[0012] By adopting the above technical solution, by setting up two coke towers and two upper intelligent spray systems, the three muds can be processed at the same time, thereby improving the overall processing capacity of the device.

[0013] Optionally, a three-mud filter is connected to the lower three-mud input pipe, and the three-mud filter is arranged on the pipe section of the lower three-mud input pipe between the three-mud pump and the upper three-mud input manifold.

[0014] By adopting the above technical solution, the three-mud filter can filter out impurities with larger particle sizes in the three-mud, which on the one hand reduces the possibility of impurities clogging the pipeline, and on the other hand makes it easier for the three-mud to be mixed with low-pressure steam in the subsequent process to form a uniform spray, which helps the reaction to proceed fully.

[0015] Optionally, it also includes a control system, wherein the lower three-mud input pipe is provided with a lower three-mud flowmeter and a lower three-mud regulating valve, the upper three-mud input branch pipe is provided with an upper three-mud flowmeter and an upper three-mud regulating valve, the lower low-pressure steam input pipe is provided with a lower steam flowmeter and a lower steam regulating valve, and the upper low-pressure steam input branch pipe is provided with an upper steam flowmeter and an upper steam regulating valve, and the control system is electrically connected to the lower three-mud flowmeter, the lower three-mud regulating valve, the upper three-mud flowmeter, the upper three-mud regulating valve, the lower steam flowmeter, the lower steam regulating valve, the upper steam flowmeter and the upper steam regulating valve at the same time.

[0016] By adopting the above technical scheme, the control system is electrically connected to the lower three-mud flowmeter, the lower three-mud regulating valve, the upper three-mud flowmeter, the upper three-mud regulating valve, the lower steam flowmeter, the lower steam regulating valve, the upper steam flowmeter and the upper steam regulating valve at the same time, so as to monitor the flow rate of each part of the pipeline in real time, control the three-mud flow and steam flow, and make the three-mud recycling process fully automatically controlled to protect the safety of the equipment.

[0017] Optionally, branch control valves are provided on both of the lower spray input branch pipes.

[0018] By adopting the above technical solution, the branch control valve controls each lower spray input branch pipe, and the operator can control the opening and closing of each lower spray input branch pipe according to actual needs.

[0019] Optionally, a quench oil input pipe is provided at the bottom of the coke drum.

[0020] By adopting the above technical solution, when the top temperature of the coke tower is too high, in order to ensure the safety of the treatment process, quenching oil is injected into the coke tower through the quenching oil inlet pipe to reduce the temperature.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Through the cooperation of the three mud tanks, coke tower, lower intelligent spray system and upper intelligent spray system, the oil and gas heat at the top of the coke tower and the heat of the coke at the bottom are utilized at the same time, which has the effect of fully utilizing the oil and gas in the coke tower and the waste heat of coke during each treatment period, improving the treatment capacity of the three muds and the safety of the treatment process;

[0023] 2. The three-mud filter removes the larger particle size impurities in the three-mud, which reduces the possibility of impurities blocking the pipeline. On the other hand, it also facilitates the three-mud to be mixed with low-pressure steam in the subsequent process to form a uniform spray, which helps the reaction to proceed fully;

[0024] 3. The control system controls the three mud flows and steam flows, making the three mud recycling process fully automatically controlled to protect the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a three-mud device for treating waste heat from a coke tower used in an embodiment of the present application.

[0026] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0027] Explanation of reference numerals: 1. three-mud tank; 2. lower intelligent spray system; 3. upper intelligent spray system; 4. coke tower; 5. control system; 6. lower three-mud input pipe; 7. three-mud pump; 8. three-mud filter; 9. lower three-mud flowmeter; 10. lower three-mud regulating valve; 11. lower spray input manifold; 12. lower spray input branch pipe; 13. branch control valve; 14. coking oil connecting pipe; 15. coking oil input pipe; 16. upper three-mud input manifold; 17. upper three-mud input Branch pipe; 18. Upper three-mud flowmeter; 19. Upper three-mud regulating valve; 20. Upper spray input pipe; 21. Lower low-pressure steam input pipe; 22. Lower steam regulating valve; 23. Lower steam flowmeter; 24. Upper low-pressure steam input header; 25. Upper low-pressure steam input branch pipe; 26. Upper steam flowmeter; 27. Upper steam regulating valve; 28. Quenching oil input pipe; 29. ​​Oil and gas output pipe; 30. Vaporization connecting pipe; 31. Vaporization output pipe; 32. Flow transmitter. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-2 The present application is further described in detail. The present application provides a coke drum waste heat treatment three muds device, which has the effect of achieving full utilization of the oil gas and coke waste heat of the coke drum 4 during each treatment period, improving the treatment capacity of the three muds and the safety of the treatment process.

[0029] Reference Figure 1 A three-mud device for treating waste heat of a coke tower comprises a three-mud tank 1, a lower intelligent spray system 2, an upper intelligent spray system 3, a coke tower 4 and a control system 5. The three-mud tank 1 is connected with a lower three-mud input pipe 6, and a three-mud pump 7, a three-mud filter 8, a lower three-mud flowmeter 9 and a lower three-mud regulating valve 10 are sequentially arranged on the lower three-mud input pipe 6 in a direction away from the three-mud tank 1, and one end of the lower three-mud input pipe 6 away from the three-mud tank 1 is connected with the lower intelligent spray system 2.

[0030] Reference Figure 1 and Figure 2 The output end of the lower intelligent spray system 2 is connected to the lower spray input manifold 11, and the end of the lower spray input manifold 11 away from the lower intelligent spray system 2 is connected to two lower spray input branch pipes 12, and each lower spray input branch pipe 12 is provided with two branch control valves 13. The provision of the branch control valve 13 facilitates the operator to control the opening and closing state of each lower spray input branch pipe 12 according to actual conditions. There are two coke towers 4, and the bottoms of the two coke towers 4 are connected to a coking oil connecting pipe 14, and the end of the coking oil connecting pipe 14 away from the coking tower 4 is commonly connected to a coking oil input pipe 15. The two coking oil connecting pipes 14 correspond to the two lower spray input branch pipes 12 one by one and are connected.

[0031] Reference Figure 1 , the lower three-mud input pipe 6 is connected to the upper three-mud input header 16, and the upper three-mud input header 16 is arranged on the pipe section of the lower three-mud input pipe 6 between the three-mud filter 8 and the lower three-mud flowmeter 9. The upper three-mud input header 16 is connected to one end away from the lower three-mud input pipe 6 and is provided with two upper three-mud input branch pipes 17, and each upper three-mud input branch pipe 17 is provided with an upper three-mud flowmeter 18 and an upper three-mud regulating valve 19 along the direction away from the upper three-mud input header 16. There are two upper intelligent spray systems 3, and the two upper intelligent spray systems 3 are arranged one-to-one with the two coke towers 4. The upper spray input pipe 20 is connected between the output end of the upper intelligent spray system 3 and the corresponding coke tower 4 tower top. The two upper three-mud input branch pipes 17 are arranged one-to-one with the two upper intelligent spray systems 3 and are connected.

[0032] Reference Figure 1 The input end of the lower intelligent spray system 2 is connected to a lower low-pressure steam input pipe 21, and a lower steam regulating valve 22 and a lower steam flow meter 23 are sequentially arranged on the lower low-pressure steam input pipe 21 in a direction away from the lower intelligent spray system 2. The lower low-pressure steam input pipe 21 is connected to an upper low-pressure steam input header 24, and one end of the upper low-pressure steam input header 24 away from the lower low-pressure steam input pipe 21 is connected to two upper low-pressure steam input branch pipes 25, and an upper steam flow meter 26 and an upper steam regulating valve 27 are sequentially arranged on the upper low-pressure steam input branch pipe 25 in a direction away from the upper low-pressure steam input header 24. The two upper low-pressure steam input branch pipes 25 correspond to the input ends of the two upper intelligent spray systems 3 one by one and are connected.

[0033] Reference Figure 1 The top of the coke tower 4 is connected to a quench oil input pipe 28, the top of the coke tower 4 is connected to an oil and gas output pipe 29, the oil and gas output pipe 29 is connected to a vaporization connecting pipe 30, and the vaporization connecting pipes 30 on the two coke towers 4 are connected to a vaporization output pipe 31. The control system 5 is connected to a plurality of flow transmitters 32, and the control system 5 is electrically connected to the lower three-mud flowmeter 9, the lower three-mud regulating valve 10, the upper three-mud flowmeter 18, the upper three-mud regulating valve 19, the lower steam flowmeter 23, the lower steam regulating valve 22, the upper steam flowmeter 26, the upper steam regulating valve 27, the oil and gas output pipe 29 and the top of the coke tower 4 through the plurality of flow transmitters 32.

[0034] Reference Figure 1When the three muds are processed, during the normal coking period, the three muds in the three mud tank 1 are pressurized by the three mud pump 7 and enter the three mud filter 8. After filtering out large particles of impurities, they pass through the upper three mud flowmeter 18 and the upper three mud regulating valve 19, the upper three mud input header 16 and the two upper three mud input branch pipes 17, and the three muds pass through the upper steam flowmeter 26 and the upper steam regulating valve 27 in the upper three mud input branch pipes 17 in sequence. The three muds in the two upper three mud input branch pipes 17 enter the liquid phase inlets of the two upper intelligent spray systems 3 respectively. The low-pressure steam passes through the lower low-pressure steam input pipe 21, the upper low-pressure steam input header 24 and the upper low-pressure steam input branch pipe 25 in sequence and enters the gas phase inlets of the two upper intelligent spray systems 3 respectively. After being atomized by the intelligent spray system, the three muds enter the coke drum 4 from the top of the coke drum 4 that is coking, and the heat of the oil and gas is used to re-refine the three muds. The control system 5 controls the flow of the three muds and steam through the flow transmitter 32. The average three mud volume is about 2t / h and the steam flow is about 0.2t / h. During the coking period of the coke drum 4, the total daily recycling of the three muds is 48t. The control system 5 monitors the top temperature of the coke drum 4 and adjusts the quenching oil volume according to the temperature of the coke drum 4. The quenching oil enters the top of the coke drum 4 through the quenching oil inlet pipe 28 to protect the safety of the coke drum 4 and downstream oil equipment.

[0035] Reference Figure 1 and Figure 2 During the small steam blowing and large steam blowing of the coke tower 4, the three muds in the three mud tank 1 are pressurized by the three mud pump 7, filtered by the three mud filter 8 to remove large solid impurities in the three muds, and then separated into one path, which passes through the lower three mud flow meter 9 and the lower three mud regulating valve 10 in sequence and enters the liquid phase inlet of the lower intelligent spray system 2. The low-pressure steam from the steam network passes through the lower low-pressure steam input pipe 21 and passes through the lower steam flow meter 23 and the lower steam regulating valve 22 in sequence and enters the gas phase inlet of the lower intelligent spray system 2. The low-pressure steam is mixed with the three muds and atomized. The atomized three muds pass through the lower spray input header 11, the two lower spray input branch pipes 12 and the two coking oil input pipes 15 in sequence and enter the coke tower 4 from the lower entrances of the two coke towers 4, and the coke heat at the bottom of the coke tower 4 is used to re-refine the three muds.

[0036] Reference Figure 1, the control system 5 controls the flow of the three muds and steam through the flow transmitter 32, and the average amount of the three muds entering the upper part is 2t / h. During the large steam blowing period, the average amount of the three muds entering the lower part is about 20t / h, and the steam flow rate is about 6t / h. During the small steam blowing and large steam blowing period of the coke tower 4, the total amount of the three muds recycled in the upper part is 6t, and the total amount of the three muds recycled in the lower part is 40t. The control system 5 monitors the top temperature and pressure of the coke tower 4. When the top temperature of the coke tower 4 is lower than the set value and the top pressure of the coke tower 4 is higher than the set value, the system alarms to remind the operator to protect the safety of the coke tower 4 and downstream equipment. Through this device, during the production cycle of the coke tower 4, the heat of the oil and gas at the top outlet of the coke tower 4 during the coke production period and the heat of the coke in the coke tower 4 during the large steam blowing period of the coke tower 4 are fully utilized, and the heat of each stage is fully utilized, so that the three mud processing capacity is greatly improved.

[0037] Reference Figure 1 In this application, the upper intelligent spray system 3 and the lower intelligent spray system 2 are used to atomize the three muds. The three muds are atomized into a spray with an average particle size of 100 microns under the action of low-pressure steam. The three muds that have been atomized can fully exchange heat with oil, gas and coke in the coke tower 4, making the three muds react more thoroughly. This application adopts the form of mixing low-pressure steam and three muds for atomization to increase the temperature and flow rate of the three muds, which can effectively improve the fluidity of the three muds entering the coke tower 4 and the contact surface of the high-temperature materials, thereby reducing the possibility of sudden boiling of the three muds in the coke tower 4. The setting of the three mud filter 8 reduces the possibility of larger particle size impurities in the three muds clogging the pipeline. At the same time, the filtered three muds are more convenient to form a uniform spray with low-pressure steam atomization in the subsequent process.

[0038] The implementation principle of a three-mud device for treating waste heat in a coke tower in an embodiment of the present application is as follows: the filtered three-mud is mixed and atomized with low-pressure steam, and enters the coke tower 4 through the top and bottom of the two coke towers 4 at the same time. The atomized three-mud at the top reacts with the heat of the oil and gas, and the atomized three-mud at the bottom reacts with the heat of the coke, thereby making full use of the heat of the coke. The upper intelligent spray system 3 and the lower intelligent spray system 2 are used to atomize the three-mud and low-pressure steam into small-particle spray, so as to facilitate their more sufficient reaction in the coke tower 4.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coke tower waste heat treatment three muds device, characterized by: The invention comprises a three-mud tank (1), a coke drum (4), a lower intelligent spray system (2) and an upper intelligent spray system (3); a lower three-mud input pipe (6) is arranged between the three-mud tank (1) and the lower intelligent spray system (2); a three-mud pump (7) is arranged on the lower three-mud input pipe (6); a lower spray input header (11) is arranged in communication between the lower intelligent spray system (2) and the coke drum (4); an upper three-mud input header (16) is arranged in communication with the lower three-mud input pipe (6); The upper three-mud input manifold (16) is arranged on the pipe section of the lower three-mud input pipe (6) between the three-mud pump (7) and the lower intelligent spray system (2); one end of the upper three-mud input manifold (16) away from the lower three-mud input pipe (6) is connected to the upper intelligent spray system (3); an upper spray input pipe (20) is connected between the upper intelligent spray system (3) and the coke drum (4); and an oil and gas output pipe (29) is connected to the top of the coke drum (4).

2. A coke tower waste heat treatment three-mud device according to claim 1, characterized in that: The lower intelligent spray system (2) is connected to a lower low-pressure steam input pipe (21), the lower low-pressure steam input pipe (21) is connected to an upper low-pressure steam input header (24), and the upper low-pressure steam input header (24) is connected to the upper intelligent spray system (3).

3. A coke tower waste heat treatment three-mud device according to claim 2, characterized in that: The coke drum (4) and the upper intelligent spray system (3) are both provided with two, the lower spray input manifold (11) is connected to the end away from the lower intelligent spray system (2) and is provided with two lower spray input branch pipes (12), the bottoms of the two coke drums (4) are both connected to a coke oil connecting pipe (14), the ends of the two coke oil connecting pipes (14) away from the coke drum (4) are commonly connected to a coke oil input pipe (15), and the two lower spray input branch pipes (12) are connected to the two coke oil connecting pipes (14) in a one-to-one correspondence. It is provided that one end of the upper three-mud input header (16) away from the three-mud tank (1) is connected to two upper three-mud input branch pipes (17), and the two upper three-mud input branch pipes (17) correspond to and are connected to the two upper intelligent spray systems (3) one by one, and one end of the upper low-pressure steam input header (24) close to the upper intelligent spray system (3) is connected to two upper low-pressure steam input branch pipes (25), and the two upper low-pressure steam input branch pipes (25) correspond to and are connected to the two upper intelligent spray systems (3) one by one.

4. A coke tower waste heat treatment three-mud device according to claim 3, characterized in that: The lower three-mud input pipe (6) is connected to a three-mud filter (8), and the three-mud filter (8) is arranged on the pipe section of the lower three-mud input pipe (6) between the three-mud pump (7) and the upper three-mud input header (16).

5. A coke tower waste heat treatment three-mud device according to claim 3, characterized in that: The invention also comprises a control system (5), wherein the lower three-mud input pipe (6) is provided with a lower three-mud flowmeter (9) and a lower three-mud regulating valve (10), the upper three-mud input branch pipe (17) is provided with an upper three-mud flowmeter (18) and an upper three-mud regulating valve (19), the lower low-pressure steam input pipe (21) is provided with a lower steam flowmeter (23) and a lower steam regulating valve (22), the upper low-pressure steam input branch pipe (25) is provided with an upper steam flowmeter (26) and an upper steam regulating valve (27), and the control system (5) is electrically connected to the lower three-mud flowmeter (9), the lower three-mud regulating valve (10), the upper three-mud flowmeter (18), the upper three-mud regulating valve (19), the lower steam flowmeter (23), the lower steam regulating valve (22), the upper steam flowmeter (26) and the upper steam regulating valve (27) at the same time.

6. A coke tower waste heat treatment three-mud device according to claim 3, characterized in that: The two lower spray input branch pipes (12) are both provided with branch control valves (13).

7. A coke tower waste heat treatment three-mud device according to claim 1, characterized in that: The bottom of the coke drum (4) is connected to a quench oil inlet pipe (28).

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